In recent days, the idyllic Greek island of Santorini has experienced a series of over 200 earthquakes, leaving its residents on edge and prompting significant precautionary actions by local authorities. Despite assurances from earthquake experts that these tremors are not connected to the island's volcano, which is infamous for one of history's largest eruptions, the persistent seismic activity has led to heightened alertness among locals.
The most significant earthquake, with a magnitude of 4.6, occurred at 3:55 p.m. on Sunday, according to the Athens Geodynamic Institute, at a depth of 14 kilometers (9 miles). This tremor was followed by a few larger than magnitude 4 and numerous smaller ones. Fortunately, there have been no reports of casualties or structural damage to date. As a preventive measure, daily meetings between earthquake experts and officials from the Ministry of Climate Crisis and Civil Protection have been underway to assess and guide the response.
Among the immediate decisions was the closure of schools on Santorini as well as neighboring islands such as Amorgos, Anafi, and Ios. Authorities have also advised residents and hotel owners in Santorini to consider draining swimming pools, as large amounts of water could potentially destabilize buildings during an intense quake. The fire service, in a proactive move, deployed a contingent of rescuers equipped with sniffer dogs and additional resources. These teams are stationed in open areas to quickly respond if necessary.
Local residents have been urged to remain cautious, particularly avoiding large gatherings and being aware of potential rockfalls—a matter of particular concern given the island's steep cliffs. Santorini's famous cliffside towns, with their panoramic views, could be susceptible to shifts if a more significant earthquake were to occur.
Seismologists indicate that while it is difficult to predict the likelihood of a stronger quake, the region is theoretically capable of producing earthquakes up to a magnitude of 6. Mild seismic activity was also detected within Santorini’s volcano caldera, mostly underwater, since September. The most notable among these was a 3.8-magnitude tremor on January 25. Encouragingly, the seismic disturbances in the volcano have since decreased.
The Santorini volcano, with its violent eruption around 1600 B.C., left a historical footprint by decimating the island, covering it in volcanic ash, and triggering massive tsunamis that impacted regions as distant as Crete and Egypt. This destructive power is a somber reminder of the island's seismic potential.
The recent spate of earthquakes comes as a reminder of the constant need for vigilance in areas with a history of geological upheavals. Santorini’s volcano is one of 16 worldwide deemed a 'Decade Volcano' due to its history of significant eruptions and its location near populated areas, highlighting the importance of continuous and careful monitoring to mitigate any future risks.
